The investigation was supposed to be a bipartisan compromise, but it’s triggered “partisan bickering,” according to ABC News Congressional Correspondent Mary Bruce: “We know what the Democrats want, we know what the Republicans want, but it ultimately comes down to what those key undecideds … think at the end.”

Eric Baradat/AFP/Getty Images

Democratic Senator Mazie Hirono address protesters against Brett Kavanaugh’s Supreme Court nomination with Senators Richard Blumenthal and Kamala Harris at her side on the steps of the Supreme Court in Washington, Sept. 28, 2018.

2. White House announces new trade agreement

President Donald Trump announced Monday that the U.S. had reached an agreement with Mexico on a revised trade deal, and that Canada had signed on.

President Donald Trump delivers remarks on the United States-Mexico-Canada Agreement (USMCA) during a news conference in the Rose Garden of the White House in Washington, Oct. 1, 2018.

3. US Navy: Chinese warship came within 45 yards of US destroyer

A Chinese warship came dangerously close to a U.S. destroyer in an encounter in the South China Sea described by the U.S. Navy as “unsafe and unprofessional.” The USS Decatur had to move out of the way to avoid a collision as it was carrying out a freedom of navigation operation near a group of disputed islands.

Secretary of Defense Jim Mattis canceled a planned trip to China later this month on Monday amid heightened tensions over trade, but ABC News’ Luis Martinez, who covers the Pentagon, says Mattis believes the two nations will be able to sort out their differences: “This is what happens when you have two great powers in the Pacific.”

An aerial shot of part of Mischief Reef in the disputed Spratly islands, in the SOuth China sea, on April 21, 2017.

4. Fitbit data helps police find suspect in woman’s murder

Police in San Jose, California, say they used a woman’s Fitbit to help track down a suspect in her murder.

“Police say that the surveillance video shows the stepfather’s car outside his stepdaughter’s home at the same time that the Fitbit data is showing her final heartbeats,” ABC News’ Emily Shapiro tells us.

The suspect, Anthony Aiello, has denied any involvement.

In other news:

On the rise: US-Canada trade deal may mean higher car prices: The U.S. and Canada squeezed out a last-minute deal to revamp the North American Free Trade Agreement with a pact expected to affect prices on cars and dairy products across North America and allowing President Trump to deliver on one of his go-to campaign promises. The new deal was greeted warily by unions and market watchers.

Football death: Georgia high school football player dies after being hit during game: The stadium in an Atlanta suburb was packed with about 2,200 spectators on Friday night when Pike County High School’s football team faced off against Peach County. The game took a tragic turn in the third quarter, when Pike County player Dylan Thomas was severely injured. Thomas died Sunday.

Protecting children: Trump admin touts children’s health programs after ousting top scientist: Less than a week after the director of children’s health issues at the Environmental Protection Agency was placed on leave, acting EPA chief Andrew Wheeler stood in front of agency headquarters Monday next to a yellow school bus and announced $20 million in state grants to test drinking water for lead in schools and childcare facilities.

Problematic visa change: Trump admin halts visas for unmarried same-sex partners of foreign diplomats: The Trump administration will no longer provide visas for same-sex domestic partners of foreign diplomats and U.N. officials serving in the U.S., a policy that went into effect Oct. 1. Only if a same-sex couple is married will the spouse be eligible for a visa, but that could prove problematic for some, as the majority of the world’s countries do not recognize same-sex marriages.

Lucky bite: 13-year-old shark attack victim ‘ready to get back out’ in the water: Keane Webre-Hayes is still laid up in a hospital bed two days after he was attacked by a shark off a San Diego beach, but he’s already making plans to get back in the ocean. Hayes’ mother, Ellie, spoke at a press conference on Monday evening and said her son is slowly recovering from serious bite wounds to his upper back, left arm and shoulder and left side of his face.

Sen. Jeff Flake speaks at the Forbes 30 Under 30 Summit, Monday, Oct. 1, 2018, in Boston, in front of a photo of him being confronted in an elevator at the Capitol in Washington by two women who said they were sexual assault victims. (Photo credit: Mary Schwalm/AP)